Ipod touch connection not working

I got my ipod touch a month before christmas, and it has been fine. I used my brothers computer to put music on it, and now I have my own (it is a laptop dell vostro 1510) when I hook my Ipod to my computer it charges, but I can't actually hook it up to get music. I have tried Itunes and it says apple mobile device service not started, then I tried using bear share. Again it will charge, but I can't put music on it, nor put music from it on my computer. I can download music from itunes by connectiong my touch using wifi, but it gets so annoying and I want my music on my computer to. I don't know what to do, any suggestions?